Plasma and Fusion Research

Volume 9, 3402123 (2014)

Regular Articles

Development of Microwave Imaging Diagnostics on the HL-2A Tokamak

Zhongbing SHI, Min JIANG, Shao CHE¹⁾, Neville C. LUHMANN, Jr.¹⁾, Calvin DOMIER¹⁾, Bin WANG²⁾, Yong YIN²⁾, Hongjuan SUN, Zhetian LIU, Xing HU¹⁾, Alex SPEAR¹⁾, Jin LI, Wulu ZHONG, Wei CHEN, Youlong CHE, Bingzhong FU, Zhengying CUI, Ping SUN, Yi LIU, Xuantong DING, Qingwei YANG and Xuru DUAN

: Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China
1): Department of Electrical and Computer Engineering, University of California, Davis, USA
2): University of Electronic Science and Technology of China, Chengdu 610054, China

(Received 19 November 2013 / Accepted 30 April 2014 / Published 29 July 2014)

Abstract

Microwave imaging reflectometry (MIR) and electron cyclotron emission imaging (ECEI) systems have been developed on the HL-2A tokamak to visualize the density and temperature fluctuations. The MIR system is comprised of a quasi-optical system, a four frequency microwave source and receiver system that generate 8(poloidal) × 4(radial) × 2(toroidal) = 64 channel images of density fluctuations. The ECEI system is comprised of a quasi-optical system, a front-end 24 channel heterodyne imaging array with a tunable RF from 75 to 110 GHz, and a set of back-end ECEI electronics that together generate 24(poloidal) × 8(radial) = 192 channel images of the 2D temperature fluctuations. Characteristics of both systems are presented. Simulations and laboratory tests of both optical systems have been conducted. The test results are in good agreement with simulations.

Keywords

microwave imaging, MIR, ECEI

DOI: 10.1585/pfr.9.3402123

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This paper may be cited as follows:

Zhongbing SHI, Min JIANG, Shao CHE, Neville C. LUHMANN, Jr., Calvin DOMIER, Bin WANG, Yong YIN, Hongjuan SUN, Zhetian LIU, Xing HU, Alex SPEAR, Jin LI, Wulu ZHONG, Wei CHEN, Youlong CHE, Bingzhong FU, Zhengying CUI, Ping SUN, Yi LIU, Xuantong DING, Qingwei YANG and Xuru DUAN, Plasma Fusion Res. 9, 3402123 (2014).